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STOCK-BASED COMPENSATION - Non-Qualified Stock Option Award Activity (Details) - Original 2010 Plan - Stock Option [Member] - USD ($)
9 Months Ended
Jan. 01, 2021
Sep. 30, 2021
Dec. 31, 2020
Shares      
Outstanding (in shares) 80,000 80,000  
Granted (in shares)   20,332  
Exercised (in shares)   (78,791)  
Outstanding (in shares)   21,541  
Exercisable (in shares) 80,000 21,541  
Weighted Average Exercise Price (in dollars per share)      
Exercised (in dollars per share)   $ 44.63  
Outstanding (in dollars per share)   43.37  
Exercisable (in dollars per share) $ 55.63 $ 43.37 $ 55.63
Weighted Average Remaining Contractual Term      
Outstanding   3 years 5 months 15 days  
Exercisable 4 years 3 months 3 days 3 years 5 months 15 days  
Stock-based compensation      
Aggregate Intrinsic Value, Outstanding (in dollars)   $ 223,833  
Aggregate Intrinsic Value, Exercisable (in dollars)   223,833  
Total intrinsic value of options exercised   900,000  
Unrecognized compensation cost (in dollars)   $ 0